package com.itzh.netty.dubborpc.netty;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

import java.lang.reflect.Executable;
import java.lang.reflect.Proxy;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class NettyClient {

    private static ExecutorService executorService = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());

    private static NettyClientHandler client;

    public Object getBean(final Class<?> serviceClass,final String providerName){
        return Proxy.newProxyInstance(Thread.currentThread().getContextClassLoader(),
                new Class<?>[]{serviceClass},(proxy, method, args) -> {
                     if(client == null){
                         initClient();
                     }
                     //设置要发给服务器端的信息
                    client.setPara(providerName+args[0]);
                     return executorService.submit(client).get();
           });
    }

    private static void initClient() throws InterruptedException {
        client = new NettyClientHandler();
        NioEventLoopGroup group = new NioEventLoopGroup();
        Bootstrap bootstrap = new Bootstrap();
        bootstrap.group(group)
                .channel(NioSocketChannel.class)
                .option(ChannelOption.TCP_NODELAY,true)
                .handler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    protected void initChannel(SocketChannel ch) throws Exception {
                        ChannelPipeline pipeline = ch.pipeline();
                        pipeline.addLast(new StringDecoder());
                        pipeline.addLast(new StringEncoder());
                        pipeline.addLast(client);

                    }
                });
        bootstrap.connect("127.0.0.1", 7000).sync();


    }
}
